We started Dubach Racing Development with the goal to produce the best exhaust systems and related mx products that actually make your bike run better, not different. I have worked with the best, tested virtually every motocross bike make over the past 10 years, and still work hand in had with the Yamaha Testing division. Riding YZs and every other brand of motocross bike, continuing to learn and develop motorcycles and moving Dr.D forward is what I do. Throughout my career, I’ve been fortunate that my avocation has also been my vocation. We know the effort that must go into a product for it to perform at a level that exceeds, the admittedly, extremely good stock bikes and ATVs. We put 100% effort into our products and constantly strive to achieve your business. - Doug Dubach

Leo Vince USA is proud to produce a wide variety of dirt bike and street bike exhaust systems. Our motocross exhaust is famous for being one of the quietest dirtbike exhaust systems on the market without sacrificing performance!

We offer Titanium and Stainless Dirtbike Exhaust with Carbon Fiber Tips for your 50, 65, 85, 110, 125, 250, 250f and 450f dirtbike! Our pipes run at 94Db out of the box and come complete with spring puller, wash plug, spark arrestor, and all mounting hardware.

Big Gun Exhaust Systems is in the business of building 4-stroke off-road motorcycle and ATV performance exhaust systems that meet and exceed all state off-road sound needs and requirements. Big Gun Exhaust Systems also produce top of the line electrical components such as Over Rev Boxes and TFI power modules and many other performance enhancing items.

DG Performance has many new exciting products available. We have always taken the lead in developing parts for the serious off-road racer. Whether it is GNC Nationals, GNCC races or the Baja 1000, DG Performance offers something for everyone.

Starting back in 1954, Yoshimura has become one of the worlds most respected engine and exhaust companies. With a complete line of 4-stroke exhaust systems and different stages of engine mods, let Yoshimura be your source of horsepower!